Featuring a five-legged castor base, the AAC 153 combines optimal functionality with modern aesthetics. Retaining the same high backrest and generous seat that characterises the series, the base is designed with a gas lift that can adjust the seat height by a range of 14cm. The base is available in either polished or powder-coated black aluminium, and the shell comes in a variety of upholstery options, providing a multitude of design combinations that give this series versatility in a wide range of corporate, public, and private contexts.